Question

read the text.
luther burbank was a pioneer in agricultural science. during his career, he developed more than eight hundred varieties and strains of plants. one of his first concerns was to come up with a potato that was resistant to disease. the result was the russet burbank potato, one of his most famous creations. another burbank creation was the sans noyau. this special plum, unlike typical varieties, had no pit and was therefore easier to eat. burbank was also responsible for the paradox walnut tree, which could grow up to sixty feet in fifteen years. this was a big improvement on other walnut trees, which can take twice as long to grow.
match the problems with their solutions.
the paradox was developed.
the sans noyau was developed.
the russet burbank was developed.

Explanation:

To solve the matching, we analyze each development:

1. For a disease - resistant potato: The text says "One of his first concerns was to come up with a potato that was resistant to disease. The result was the Russet Burbank potato". So the problem of needing a disease - resistant potato is solved by developing the Russet Burbank.
2. For a plum that is easy to eat (no pit): "Another Burbank creation was the Sans Noyau. This special plum, unlike typical varieties, had no pit and was therefore easier to eat". So the problem of a plum being hard to eat (due to pit) is solved by developing the Sans Noyau.
3. For a faster - growing walnut tree: "Burbank was also responsible for the Paradox walnut tree, which could grow up to sixty feet in fifteen years. This was a big improvement on other walnut trees, which can take twice as long to grow". So the problem of slow - growing walnut trees is solved by developing the Paradox.

Answer:

• Problem: Need a disease - resistant potato; Solution: The Russet Burbank was developed.
• Problem: Need a plum that is easy to eat; Solution: The Sans Noyau was developed.
• Problem: Need a faster - growing walnut tree; Solution: The Paradox was developed.